Program: GN-2022B-Q-320

Title:Visual Orbits of Exoplanet Host Binaries
PI:Kathryn Lester
Co-I(s): Steve Howell, Rachel Matson, David Ciardi

Abstract

We propose to obtain high resolution speckle images of binary stars hosting exoplanets in order to measure the relative position of each binary component and map the orbital motion. Our goal is to compare the orbital demographics of exoplanet host binaries to that of field binaries and investigate the dynamical environments where planets can safely form. The presence of a close stellar companion can impact planet formation through dynamical and tidal interactions, such as truncation of the protoplanetary disk and the migration of giant planets. About 50% of exoplanet host stars were found to have a stellar companion, so this study will provide an important step towards understanding the role of multiplicity in planet formation, evolution, and habitability.